... but apparently didn't have a gun or explosives.
Contrary to what KSN is claiming, police did NOT find explosives in the home of a student who had claimed he wanted to shoot and bomb other students. After this was heard by other students and passing it on to the proper authorities, the angry ones house was raided and an incendiary device was recovered.
While I'll be the first to admit that incendiaries are very dangerous (more so than explosives in my opinion), they are not explosives. Firebombs aren't "explosives" and even then: incendiary device could be anything from a thermite grenade* to a Molotov cocktail or just a plastic bottle of coleman fuel.
* military designation: AN-M14 TH3